On my new 331, with 9.2:1 comp, I run right around 12-13 in. hg. It's pretty steady maybe moves +/- 1. I was running around 11 with my old heads/cam/intake 302.
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1991 5.0 LX Coupe - 40,750 miles
331 cu. in. / Tremec 3550 / BFG Drag Radials
12.22 @ 114.31 mph - w/1.89 60'
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